Series  745 Cone Part Number  749-S Cup Part Number  742D Design Units  Imperial Bearing Weight  17.1376 lb 7.7735 Kg Cage Type  Stamped Steel D - Cup Outer Diameter  6.1250 in 155.575 mm d - Cone Bore  3.3475 in 85.027 mm B - Cone Width  1.8375 in 46.673 mm C - Double Cup Width  3.3750 in 85.725 mm T - Bearing Width across Cones  4.0000 in 101.600 mm Z - Number of Rollers Per Row  18 Ka - Locking Pin Diameter  N/A Kb - Locking Pin Depth  N/A R - Cone Backface "To Clear" Radius1  0.200 in 5.100 mm r - Cup Frontface "To Clear" Radius2  0.06 in 1.5 mm db - Cone Backface Backing Diameter  4.09 in 103.90 mm Da - Cup Frontface Backing Diameter  5.64 in 143.26 mm Aa - Cage-Cone Backface Clearance  0.07 in 1.80 mm C90 - Dynamic Radial Rating (One-Row, 90 million revolutions)1  21900 lbf 97600 N C1 - Dynamic Radial Rating (Two-Row, 1 million revolutions)2  147000 lbf 656000 N C90(2) - Dynamic Radial Rating (Two-Row, 90 million revolutions)3  38200 lbf 170000 N Ca90 - Dynamic Thrust Rating (90 million revolutions)4  12200 lbf 54400 N K - Factor1  1.8 e - ISO Factor2  0.68 Y1 - ISO Factor3  0.99 1.47 Y2 - ISO Factor4  1.47 G1 - Heat Generation Factor (Roller-Raceway)5  160 G2 - Heat Generation Factor (Rib-Roller End)  26.3 Cg - Geometry Factor6  0.0898

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